smpte 2094

[Selur]

What is this JSON file? I don't know how to get it.

The JSON file contains the light values for each frame.
Like I wrote before.

--dhdr10-info <filename>

Inserts tone mapping information as an SEI message. It takes as input, the path to the JSON file containing the Creative Intent Metadata to be encoded as Dynamic Tone Mapping into the bitstream.

Click here for the syntax of the metadata file. A sample JSON file is available in the downloads page

source: https://x265.readthedocs.io/en/default/c...hdr10-info

Can you set the encoding directly?

Without the json file you can't create a HDR-10+ stream.

Is it possible to code as easily as HDR10?

Since HDR-10+ is dynamic you need data per frame, not just static values like with HDR-10.

Cu Selur